Engineering, 16.11.2020 17:20 eweqwoewoji

It has been reported that Americans as a whole (300 million of us) ingest a total of approximately 8 tons/day of lead from corrosion of water pipes and lead-tin solder in older potable water distribution systems. The drinking water standard for lead is 0.05 mg/L total soluble lead. One method for removing heavy metals such as lead is pH adjustment to precipitate the metal hydroxide. Required:
a. Draw a diagram that shows the concentration of all the lead hydroxide complexes in a saturated solution.
b. Using the logarithmic concentration diagram, determine the minimum solubility of lead (in mg/L as Pb) in water.

Answers: 1

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Answers: 3

Answer

Engineering, 04.07.2019 18:20

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?

Answers: 3

Answer

Engineering, 04.07.2019 19:20

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2

Answers: 2

Answer

Engineering, 04.07.2019 19:20

A5 kg block of fe is dropped into a very large vat of water. the fe and water initial temperatures are 95 and 25 c, respectively. the fe final temperature is 25 c and the water can be treated as a thermal reservoir,. treated as a thermal reservoir take the water to be the system and determine the entropy generation. report vour answer in kj/k.

Answers: 1

Answer

You know the right answer?

It has been reported that Americans as a whole (300 million of us) ingest a total of approximately 8...

Questions